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Re: [TenTec] RF Ground

To: <geraldj@storm.weather.net>, "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] RF Ground
From: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 6 Apr 2009 11:59:51 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Oh yes, isolation is best, that is until lest we forget.

I also agree that guy wires should have a driven ground outside of the 
anchor base and a separate #6 connected to all of the guys above the 
turnbuckle.  And guy wires should have a bond between the tower and the guy 
at the tower attachment point.  This is specially true if one wants to avoid 
VHF and UHF IM problems.

Bob, K4TAX

----- Original Message ----- 
From: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
To: <tentec@contesting.com>
Sent: Monday, April 06, 2009 11:42 AM
Subject: Re: [TenTec] RF Ground

> On Mon, 2009-04-06 at 06:05 -0400, Gary Smith wrote:
>> Hi Bob,
>> My antennae use the same radial field of 60 or so 130' radials. The
>> radial plate is 360' from the house. The only connection between the
>> house and the radial field is via the coax shield. Are you suggesting
>> I run a length of additional wire from one of the radials to the
>> grounding point of the service entrance ground rod?
>> Gary, KA1J
> I prefer to isolate the tower from the house wiring during
> thunderstorms. When lightning hits with a few kilo amps and the house
> wiring is 12 gauge, even a small fraction of those few kilo amps wipes
> out house ground wires, radios, and appliances. So I keep those ground
> separated unless I need to connect them for coax fed antennas or finding
> RF on my key or microphone.
> I also prefer that the tower guys not be insulated to spread tower
> grounding over a much larger area. Sure for RF the ground field and the
> house should be interconnected and the guy wires not resonant, but to
> handle kilo amps (and my tower get direct hits being out in the country
> and taller than anything in nearly a mile in all directions), I WANT all
> those guy wire grounds isolated from the house wiring.
> 73, Jerry, K0CQ
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